yes, a lot of people go without interrogation or problem, we speak about maybe less than 5%. Just read the people who get interrogated to understand what about immigration is looking up.
some things trigger immigration ( just read what people get interrogation report here )
1/ you use a agent visa to get the dtv visa
2/ you apply not in your home country
3/ you need to get explaination what you will do in thailand ( if softpower you do each time no problem ... if you get a 1 time muathai.. you will not have a lot to say to that question related to the visa )
Just read what people say of the interrogation by immigration.
Of course, you can also go in without interrogation, or can provide enough good/valid response to go in.
For now nobody get refused to go back in, but there will be case, for sure.