I don’t see any tag created with the name “Spib”, so I don’t think it’s something very universally shared amongst people worth enough to make it an alias, since the purpose of it is to facilitate searches. It does sound cute though.
But of course, would be better to wait for staff to confirm.
I noticed other ponies had cute names as their aliases so I thought it would be nice to have it on Spitfire as well. It is not too much used but I think it would not hurt to add it as an alias.