Change your name infinitely:

1. Download Fiddler from this link:
https://www.telerik.com/download/fiddler and allow it to decrypt HTTPS traffic. (Tools > Fiddler Options > HTTPS > check "decrypt HTTPS traffic" and accept the dialogs)

2. Go to google+ and attempt to post "@107000000000000000000". The post should fail to send.

3. Go back to fiddler and open the composer tab. Drag+Drop the last red item from the left to the "request body" box.

4. Select everything before "&at=" and paste this string in it's place:

f.req=%5B%22af.maf%22%2C%5B%5B%22af.add%22%2C116597761%2C%5B%7B%22116597761%22%3A%5B%5B%22FIRSTNAMEHERE%22%2C%22LASTNAMEHERE%22%5D%2C%5B3%2C%22GENDERHERE%22%5D%2C%5Bnull%2C6%2C12%5D%2Ctrue%2Cnull%2C%5Btrue%5D%5D%7D%5D%5D%5D%5D

6. Replace FIRSTNAMEHERE, LASTNAMEHERE, and GENDERHERE accordingly.

7. Click Execute.