For a child, that would be a no-go. Medical procedures should not be used as punishment. Although I do recall one instance in my own childhood when I refused to keep an oral thermometer under my tongue and ended up over my mom's lap, but I think that's different. Even if a kid hates RT's, they ought to be saved for when the child actually needs one or it just increases fear of needing one.
Now, if we're talking about consenting medfet adults here, then sign me up! Like others, although the humiliation and submission are great, but the experience might need to be intensified with a menthol-based lube, spanking before or after, or all of the above!