Bringing in 1000+BB at a small stakes limit table

[yellowjack]

Ever since I've started I notice people choosing to buyin for say $100 at a 0.02/0.04 table. Just tonight I saw a 2+2er who I never respected, but thought better of do the same (bringing $500 more to the 0.25/0.50 table after losing a few bucks), while tilting very badly while berating a fish.

What do you think these players are trying to do by bringing in hundreds for a small stakes limit (hold'em) game?