FresnoRaves is *not* a paging service, nor is it a "chat line" for one-sentence messages. If you want to just "chat", check out VRave. FresnoRaves is also not a group therapy support line - but thoughtful posts about how you have been affected by rave culture are appropriate, because after all raving is a very personal experience.
The occasional humorous post or not-entirely-rave-related topic is fine, but please prefix it with the letters "NRR" in the subject line (as in, "Non-Rave-Related") so people who don't want to see that can filter it out.
Promoting your party, your DJ gig, your new mixtape, etc. are all fine, but please prefix the subject line with the letters "BSP", as in "Blatant Self Promo.”
Offering things for sale are fine, so long as they are marginally rave-related, such as musical instruments, sound systems, lighting gear, etc. This time, prefix it with the letters "4SALE.”
Normal etiquette is to wait around 2 weeks or more before you start posting anything; that ensures that you don't tread on old ground and that you have a reasonably good idea of the mindset of the list.