Stand already has a very good protections configuration by default, but maybe you want a little bit extra.
Some additional protections you may want to enable when not doing any missions:
Syncs > Incoming Syncs > Heuristic Clone Create Crash Protections > PED — Prevents certain types of crashes. We use heuristics because people can't stop inventing new crashes.
Raw Network Events For Your Consideration
Carefully walk into Events > Raw Network Events, and try not to touch anything, no matter how good it sounds.
Some things you might want to consider while you're here:
Explosion — They're everywhere, and they look amazing. Without explosions, GTA Online just looks weird, so you shouldn't block this, but consider notifications so you can pinpoint the source of unusual explosions, including blamed kills.
NETWORK_PTFX_EVENT — Used for the orbital cannon's explosion in freemode or sparks on your drill in missions, but can also be abused by modders to fill your screen and make you lag. Consider notifications and/or blocking.
Additionally, if you don't like your weapons being messed with outside of missions, consider notifications and/or blocking for:
What Not To Do
Understand that protections are very delicate and it can be hard to understand what effect enabling notifications and/or blocking may have on your experience. With that in mind, here's some things you should not touch, and why you shouldn't touch them.
REQUEST_CONTROL_EVENT — Blocking this will cause people around you to be unable to drive their vehicles, and if those people are modders, expect kicks and crashes coming your way. Take a look at Events > Vehicle Takeover, instead.
NETWORK_CHECK_EXE_SIZE_EVENT — Blocking this will make you unable to join sessions.
KICK_VOTES_EVENT — More intelligent reactions can be found in Online > Reactions > Vote Kick Reactions.
NETWORK_CHECK_CODE_CRCS_EVENT — Notifications will annoy you, and blocking it may not be a good idea.
REPORT_MYSELF_EVENT — Notifications will annoy you, and blocking it may not be a good idea.
And just in general, don't block it if you don't understand the impact of it. Instead, consider enabling notifications on it, seeing what it correlates with, and only when you fully grasp it and decide you don't want it, should you block it.