I think that neither you or I will really benefit from adding signatures because signatures are useful when you post single pictures that can be scattered on the internet.

When your pictures are mostly 500 image series LOL, there is a little chance that your name will get lost.
It is even very unlikely that someone will repost then without packing into the archive

However, adding some signature and title to the first picture in the series may be pretty useful. But at least for me, It is hard to decide the series name and sometimes other people unintentionally do it for me ;)