"allergic to wifi", &c.
If this stuff is enough to worry you, then you should be utterly terrified of light bulbs. Why, a tiny amount of their radiation is actually ionizing, and their power output--all in wavelengths much shorter and generally more threatening than puny RF--simply puts a cell phone to shame.
If radio or microwave fields are doing direct harm to living tissue, it is because they've been made strong enough to cook it. This will not happen without your knowing, I guarantee. However, I suspect you're not in the habit of removing the door from your microwave oven, bypassing the safety interlock, pushing the "popcorn" button, and staring into the thing from two inches away. Microwaves and RF waves cannot directly cause electronic transitions in molecules. At best, they can gradually heat up the molecues, because the best they can do is introduce vibrations; if those vibrations are strong enough to do anything substantial, you will be screaming. Any electronic transitions that happen will happen because the tissue in question has been left in the microwave until it was heated to the point of burning. A cell phone is not going to denature proteins or snap bonds or anything of the sort.
It's an obvious conclusion that makes obvious physical sense, and a great body of research stands behind it. A few milliwatts of microwave power are not going to make you grow tumors. Now and then, some piece of cargo cult science starts with a desired conclusion and scrounges for dodgy data until the desired answer seems to be supported, but I hope you're not giving those too much credit*. If a warning label is necessary for a thing like that, then we'll damn well run out of paper to print the things if we're consistent about it and apply a warning label to everything else that is comparably hazardous (i.e. spoons).
*i.e. "Hey, guys, let's find a bunch of Finnish people with brain tumors and see if they claim to have used cell phones a lot. Nobody's heard of recall bias anyway." or "Let's strap obnoxious heavy things to test subjects' heads for several hours at a time, see if they report discomfort, then try to suggest the radiation did it." or "Let's blast cells with microwaves from an eight hundred watt magnetron, then only mention that we used an eight hundred watt magnetron once in our paper and go on to talk about our results like they relate to cell phones." I wish I made any of that up. These are the things I find whenever I hear somebody say "There have been studies that show that..."; really, generally beware of the word 'study'. All the most weasly bad experiments call themselves that for some reason. In general, beware of any purported experiment that was designed not to verify a thing, but to "prove" it; the difference between the former and the latter is the difference between science and bullshit.