can i block other users gestures from interacting with my avatar?

[Rolig Loon]

Not really, but you do have some options, starting with "choose a better class of friends."  You can prevent people from shoving you by sitting down.  That's not always convenient, but it works.  When you are seated, you are linked to whatever chair/bench/box you are sitting on -- effectively anchored.  Other than that, you can submit an Abuse Report if you wish.  A report of a single shove isn't likely to get much attention, but if you have documented evidence of a pattern of repeated shoves, that constitutes harrassment, which is more serious.

[Rolig Loon]

Not really, but you do have some options, starting with "choose a better class of friends."  You can prevent people from shoving you by sitting down.  That's not always convenient, but it works.  When you are seated, you are linked to whatever chair/bench/box you are sitting on -- effectively anchored.  Other than that, you can submit an Abuse Report if you wish.  A report of a single shove isn't likely to get much attention, but if you have documented evidence of a pattern of repeated shoves, that constitutes harrassment, which is more serious.