Oh, Bon Jovi opened for lots of bands in the early days. Kiss, Scorpions, ZZ Top, Judas Priest. I personally think it's a good idea, why not give some local bands a bit of a kick start on a big stage. If I wanted to see a bigger band (ie, Goo Goo Dolls) I'd buy a ticket to see them at one of their headlining shows. Then, at least I'd get a proper set with decent sound, a good crowd and a bit of passion.