TBH if such an annoying chat robot pops up, my answer could also be a very unfriendly 'go away'. Regarding photo difference this has likely to do with part of the audience which use such a mem maker kapwing site: idiots. An ip lookup who they are and/or coming from would have been interesting.
We didn't include "Go away" or "get out of my way" or even "shut up" in the count of rude messages. I only counted messages where a user swore, called me a name, or said something clearly aggressive or mean.
But many of the examples in the blog I could never ever imagine to write. No happy man or women would. Thus I'm interested who would? Are there any (aggregated) trends?
That there are idiots is a given. Neverthelesss, I would still present a down to earth real picture (not from you personally of course, but also not some stock foto or robot). Reason: if you spend the time/cost to provide high-quality personal assistance (opposed to some random chat-center no-help) you might as well show it (and filter out the idiots - you wouldn't want to provide services to them anyway!).