Following situation on 70D / SL1 and maybe other touch enabled cams:
In debug menu -> show tasks -> scroll right to the extended list displaying all tasks.
Now if you touch the lcd then parts of the canon menu will overlay for half a second the list of tasks being dispayed and the canon menu setting popping up will change due to the touch function. Was able to see and edit / browse stuff like "Enable / Disable" and "Format card keep ML" etc.
There's a canon menu setting to disable touch so there's a property which we could overwrite when opening / closing "show tasks" to disallow touch.
Encountered this with some test builds having both "CONFIG_TOUCHSCREEN" and also "CONFIG_TSKMON" undefined. Other ML menu items may be affected too (didn't try out yet)
Maybe others with a 700D or 650D can try and confirm.