LMAO! Yes, anybody over 25 is a geezer (according to my kids and their friends). And only a geezer would know who the voice of Shaggy is! I qualify on both counts! But who the heck cares? It's all in the mind....(I meant no offense to you, BTW).
And Old Guy With 87 GT is younger than you, and look at his name!
Rooby-rooby-ROO!