Bypass 1 - Set Transparency
Any instance that has any transparency greater than 0 cannot be highlighted at all. It’s not a visual bug either, because it completely goes straight through the transparent part and instead selects the instance behind it.
Video Demonstration:
Exact model I used:
In Game Report Highlight Mode Bypass Example.rbxm (3.9 KB)
Bypass 2 - Parent to Player.Character
Any model that’s a descendant of the Player.Character will be ignored by the highlight mode entirely, even if it’s a custom character such as a StarterCharacter. Same case here of it not being only visual because of it selecting parts behind.
Video Demonstration
The parts don’t necessarily have to be welded such as in the video, they can literally be anywhere, unable to be selected as long as it’s a descendant of the character.
Exact StarterCharacter model I used:
In Game Report Highlight Mode Bypass Example 2.rbxm (26.0 KB)
^ To use, parent this model to StarterPlayer
Any developer aware of these bypasses could simply set the transparency of TOS-violation models or parent them to the player character and be able to more-easily avoid moderation by preventing one method of report entirely.