Signatures are not allowed on Stack Overflow.

Put whatever information you want on your user page -- that's what it is there for! -- but cluttering up questions and answers with redundant information is not a valid use of the system.

see: 

- https://meta.stackexchange.com/questions/28416/what-is-the-policy-on-signatures-and-links-in-answers-for-so-questions
- https://meta.stackexchange.com/questions/5029/are-taglines-signatures-disallowed-on-stackoverflow