I guess this is the best of the bad solutions I have to fix my issue untill they give us access to a setting option to use it or not on the lock screen. Though I really like tap to wake since there are no more button on the X and I use it a lot when at my desk to quickly unlock the phone. I whish it could be something a bit less easy like triple tap or something not likely to happen in a pocket though.
On top of this, with summer coming I find the tap to wake in the pocket a bit too sensitive, may be with the light sweat moist when it becomes hot outside. Thigh skin interacts more with the screen through trouthers pockets when it's hot outside. Last Cristmas holidays under the tropics turned out to be quite expensive in roaming since I kept calling my wife for 2 minutes (voice message lenght) each time from my pocket. I ended up with a 100€+ Bill at the end of the trip just from pocket calls.
I know I could also turn the screen facing front, not facing my thigh, but I do it to protect the screen should I bump into a table or a subway rolling barrier and damage the screen.