I agree with Honda2014 above- if you have full coverage, maybe investigate lowering your comprehensive deductible. Lowering it is usually pretty cheap... at least in my neck of the woods. I lowered mine from $250 to $100 and I think it only added like $6 to my six month premium.
Quite a few people have added wire or plastic mesh to that area of the front bumper- not to deter people from stealing the radar sensor- but rather as a cheap way to prevent damage to some of the bits behind the bumper. People did this on the 9th Generation Accord too- as some of those bits can be damaged pretty easily if hit by stones or rocks that are kicked up by other cars. I haven't seen anyone talk about it recently with a 10th Generation Accord- but I remember when it first came out people were experimenting with different types of screens and mesh to protect the expensive components behind the lower grille- and someone found a material that worked without obscuring the radar sensor. Installing a screen of some sort might convince a thief to go after an easier target.
Good luck.