The science is still out on whether it's harmful or not. I got TSA pre so I can just avoid it, but before that I always opted out.
"The International Agency for Research on Cancer (IARC) is part of the World Health Organization (WHO). Its major goal is to identify causes of cancer. The IARC has classified RF fields as “possibly carcinogenic to humans,” based on limited evidence of a possible increase in risk for brain tumors among cell phone users, and inadequate evidence for other types of cancer."
I would not call that "thoroughly settled".
So, an organisation that basically labels everything in the world as either a potential carcinogen or carcinogen [0] when the second lowest score they award still reads as 'potential carcinogen' is more powerful than actual evidence, accrued across enormous longitudinal studies, first from scandinavia [1] but backed significantly by australia [2] and integrated into a plausable mechanism for increases in >70 year olds [3] combined with a finding that would actually revolutionise physics and biology for suggesting a new mechanism for the interaction of electromagnetism and biology?
Alarmists are everywhere [4]. But that doesn't mean they are right. It's easy to listen to fear, but just because someone is screaming and crying doesn't make them right. Serious claims deserve to be looked at seriously, and this one has been throughly examined, in research that is continuing. And it continues to be debunked by huge datasets - not just the referenced studies but also the million woman study [5][6] and others.
So yes, I repeat, for anyone versed in science, physics and with their head screwed on straight, the science is settled, and I challenge you to demonstrate either a mechanism or a throughly vetted dataset that proves otherwise. And i'll remind you that hitting the first answer on google does not constitute research.
[0] http://thehill.com/blogs/congress-blog/healthcare/299632-cha...
[1] https://doi.org/10.1136/bmj.d6387
[2] http://www.cancerepidemiology.net/article/S1877-7821(16)3005...
[3] https://www.ncbi.nlm.nih.gov/pubmed/15378499
[4] http://theconversation.com/new-study-no-increase-in-brain-ca...
[5] http://scienceblog.cancerresearchuk.org/2014/05/14/back-in-t...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1994795/
https://www.ncbi.nlm.nih.gov/pubmed/25251956
Perhaps it doesn't cause cancer per se, but promotes tumor growth or otherwise creates a more favorable environment.