What is the purpose of checking another site ?
The recommendations appear to be to change passwords but not bother until the site(s) have patched the problem. As a result I have changed many passwords in the last few days, I have often used one of these vulnerability checkers to see if the site was no longer vulnerable (or maybe never was).
The intention is to protect my security, not to try to break in somewhere. Also scanning implies testing many machines, usually at random - I have done targetted testing of sites where I have accounts.
So, PC Plod: if I have done wrong email me via el-Reg and come to arrest me. My conscience is clear.
Disclaimer: I did not read the relevant acts before writing this.