this is a nice thought... but a problem i see is, what many people here have other suggestions of what they see in the loop. so it could be difficult to tag the loops in a way, that everybody find thier special loop. maybe you could write it right of the loop window, so if you search the loop and you know the hash-tag, that you find it easierly.
another prob i see is, that many loops could declared twice. like "anime", "galaxy angel", "boy" and so on. i think it would be difficult to keep apart them in a good way.
if someone has a good idea to solve the problems i spoken to, maybe we could talk about this again
Chaos is my first name, Katze my second... See whats written and think about that fact.