It could take awhile for one of them to come down from Mount Olympus, so I'll answer for ya: yes. Just be tasteful...
Also, bear in mind that exceptionally large pictures will cause problems with slower machines. And, I've seen people on a similar UBB have trouble downloading sound clips.
Heck...there was a time when this site was something like a Saturday cartoon show!
http://www.roguesquadron.net/forums/biggrin.gif)
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"I sought the true nature of reality but discovered instead the real nature of truth."
--Thrustweasel of Earth