SearX v5.3 you shouldn't be worry it's fine as long as you don't have it open during online game play but as for MW3 .NET External ESP v2.3 [1.5.388] ? Even if player's don't report you I believe it is detectable by VAC and it's usually a delay ban.
---------- Post added at 03:06 PM ---------- Previous post was at 03:03 PM ----------
And yes, I would wait a couple of weeks I tried MW3 .NET External ESP v2.3 [1.5.388] and got banned within 3 weeks and I have also tried SearX v5.3 but wasn't ban for almost 4 months now and of course player's have reported me but VAC did not detect anything from SearX v5.3 so I'm safe^^ and yes I got two mw3 account.