| # | Name | Town/City | S/C/P | Comment | Date |
|---|---|---|---|---|---|
| 501 | Jie Yao | Torrance | CA | N/G | Mar 23, 2017 |
| 502 | Waleed Elsegeiny | Pittsburgh | Pennsylvania | View | Mar 23, 2017 |
| 503 | Taylor Eddens | Pittsburgh | PA | N/G | Mar 23, 2017 |
| 504 | Jakob Zimmermann | Bern | Switzerland | N/G | Mar 23, 2017 |
| 505 | Kristen Powers | New York | New york | N/G | Mar 23, 2017 |
| 506 | Anonymous | New Haven | CT | N/G | Mar 23, 2017 |
| 507 | Michele Hardy | Pullman | Washington | N/G | Mar 23, 2017 |
| 508 | Anonymous | Chicago | IL | N/G | Mar 23, 2017 |
| 509 | Stephanie Eisenbarth | New Haven | CT | N/G | Mar 23, 2017 |
| 510 | Timothy Hand | Pittsburgh | Pennsylvania | View | Mar 23, 2017 |
| 511 | Nicholas Lukacs | Brighton | Michigan | N/G | Mar 23, 2017 |
| 512 | Oren Rosenberg | San Francisco | California | N/G | Mar 23, 2017 |
| 513 | Anonymous | Chicago | IL | View | Mar 23, 2017 |
| 514 | Sue Gordon | N/G | N/G | N/G | Mar 23, 2017 |
| 515 | Anonymous | Pittsburgh | Pennsylvania | N/G | Mar 23, 2017 |
| 516 | Saige Pompura | New Haven | Connecticut | N/G | Mar 23, 2017 |
| 517 | Bill Clinton | N/G | N/G | N/G | Mar 23, 2017 |
| 518 | Patricia Masso-Welch | Clarence Center | New York | N/G | Mar 23, 2017 |
| 519 | Anonymous | New Haven | CT | N/G | Mar 23, 2017 |
| 520 | Alejandro Soto-Gutierrez | Pittsburgh | PA, USA | N/G | Mar 23, 2017 |
| 521 | Sean Mcsweeney | Colchesteer | 1 brookside close | View | Mar 23, 2017 |
| 522 | Torsten Wittmann | San Francisco | CA | N/G | Mar 23, 2017 |
| 523 | Stephanie Konecki | Chicago | Illinois | N/G | Mar 23, 2017 |
| 524 | R Schatz | Molalla | OR | N/G | Mar 23, 2017 |
| 525 | Naftali Kaminski | New Haven | CT | N/G | Mar 23, 2017 |
| 526 | Kim Taylor | Berkeley | California | N/G | Mar 23, 2017 |
| 527 | Alexandra Collin de l'Hortet | Pittsburgh | Pennsylvania, USA | N/G | Mar 23, 2017 |
| 528 | Greg Delgoffe | Pittsburgh | Pennsylvania | View | Mar 23, 2017 |
| 529 | Nir Drayman | Evanston | IL | N/G | Mar 23, 2017 |
| 530 | Kirby Sullivan | Cincinnati | OH | N/G | Mar 23, 2017 |
| 531 | Kazuki Takeishi | Pittsburgh | Pennsylvania | N/G | Mar 23, 2017 |
| 532 | Joseph Hargan | Los Angeles | CA | N/G | Mar 23, 2017 |
| 533 | Yan Xiong | Torrance | CA, | View | Mar 23, 2017 |
| 534 | Anonymous | Los Angeles | California | N/G | Mar 23, 2017 |
| 535 | Timothy Arthur | Cambridge | Massachusetts | N/G | Mar 23, 2017 |
| 536 | Tori Wilcox | Toronto | On | N/G | Mar 23, 2017 |
| 537 | Anonymous | SAINT LOUIS | MO | View | Mar 23, 2017 |
| 538 | Anonymous | New Haven | Connecticut | N/G | Mar 23, 2017 |
| 539 | Yimin Du | New Haven | Connecticut | View | Mar 23, 2017 |
| 540 | Raymond Slavin | St Louis | Mo | N/G | Mar 23, 2017 |
| 541 | Anonymous | Buffalo | NY | N/G | Mar 23, 2017 |
| 542 | Benjamin Kopp | columbus | Ohio | N/G | Mar 23, 2017 |
| 543 | Anonymous | South Pasadena | CA | N/G | Mar 23, 2017 |
| 544 | Dana Previte | Pittsburgh | PA | N/G | Mar 23, 2017 |
| 545 | Jim Schneider | Pittsburgh | Pennsylvania | N/G | Mar 23, 2017 |
| 546 | Anonymous | St. Louis | MO | N/G | Mar 23, 2017 |
| 547 | Inderroop Singh | Chicago | IL | N/G | Mar 23, 2017 |
| 548 | Ross Fleischman | Irvine | CA | N/G | Mar 23, 2017 |
| 549 | Alan Healy | New Haven | Connecticut | N/G | Mar 23, 2017 |
| 550 | Anonymous | Pittsburgh | PA | N/G | Mar 23, 2017 |
- S/C/P - State, County or Province
- Dates displayed in the signature list are based on UTC/GMT
- Anonymous signatures signify people who have chosen not to display their names publicly
- A comment in gray indicates that the signer has hidden their comment from public view