Option 1 (the easiest): Block them :)
Option 2: Mute and hide avatar.
Option 3: Leave instance.
Option 4: Just don't accept their friend request.
Option 5: Don't surround yourself with older people because they seem "cool." They're likely preying on attention.
Option 6: Unfriend him if you have him added.

-His bio says he is 21+ and has a description like:
~"Broken"
~"Alcoholic"
~"Lonely"
~"Dominant"
-He's hanging around minors!!
-He talks about his "special" times in VR.
-He wears one of those really close to ♥♥♥♥♥ demon avatars.
-He offers to buy you anything within a 3-month period.
-He unloads his sob story on you within a week.
-He wants to hang out with you everyday.
-He is in any of the following or close to groups:

If you are a young, new VRChat player (you don't even have to be a female, it can happen to anyone), I suggest you follow this guide. I, myself, have been victim to plenty of these types of men. You may think that it is an obvious give away to not interact with these types of people, but with influence, it can be hard. You should stand your ground and not give into the side insults. Please! Listen to my warnings for much damage could be done without action. Thank you <3

P.S. I would like to mention that this doesn't even cover all bases, but most of what I have noticed. This mostly talks about creepy men, but there are definitely still creepy women too. Follow the same options and observations. Be safe out there!

Extra P.S.! This post is talking about the adults who want to get freaky with minors. I agree that it is not illegal to date at any age. Usually though, that's what they mostly head towards. Just be safe out there!