I’m curious as to how long it takes for this to actually happen. In essence when someone decides to backdoor you’re leaving your team in a state of 5v4 anyway. So are you at an advantage or disadvantage? From what I’ve seen so far it actually takes a good bit of time to get the shield down an start chipping away at the sentries health ( at higher levels of course it would take less time). I’d say this is a legit tactic, but moreso exploits the lack of communication that there is in this game right now. Just like in any MOBA you should be splitting your attention from whats going on in front of you and and whats going on in your HUD (sentry exclamation mark, NOVA shouting at you, the sentry shouting at you). My question to those that are calling this cheap or cheating is do you not have a back line? In every single game if you don’t have an OM,Marquis,WF, Benedict or just someone who’s role it is to basically sit back and clear waves and such you might be doing it wrong and need to be THAT guy. Just having that would prevent a lot of backdooring anyway. I haven’t tried backdooring myself by but when I use benedict or marquis, i’m just sitting on my perch and killing minions/chipping away at enemy BB. There’s legit no way you can NOT hear/see the multiple indications that he’s being attacked imo. Not only does the exclamation mark pop up, nova says something and then your sentry himself starts complaining and crying that he needs help, doesnt want to die alone blah blah. I CAN vouch for the fact that the exclamation point popping up is bugged I believe but you should be checking on your sentry anyway just to see but it doesn’t happen often enough for it to warrant NOT checking to see whats going on. But thats where the communication comes in unfortunately because if you ARENT the guy in the back line whose job it is to actually handle that then its kind of an SOL situation because of course everyone cant be that type of character and expect to win against anyone thats competent. Just my two cents.
TL;DR no its not cheating because there are still plenty of indicators to help you prevent it from happening even if they are taking 0 damage from the sentry itself. Pay attention to your alerts. imo.