Quickly too bout showing bluffs:
Showing bluffs is often a multi-layered STRATEGY
Some of the strategic reasons should be obvious
Some players mistakenly think guys showing bluffs are disrespecting them... couldn't be more wrong.
Now... if someone shows a bluff then starts talkin smack: "whatta fukkin donk... whatta fukkin idiot for laying that down, etc..." then obviously YES, they are being disrespectful.
But that's totally different then just silently showing: one's strategic... the other is someone being an a-hole.
It's really not hard to discern the difference.