If I were carrying a bowl of hot soup noodles and have to look for a seat, I would. I will not use the tissue paper method.
Much has already been said about the negatives of the tissue method so its hardly worth dragging it out by repeeating it again after such a long time when this thread is now being revived again.
If the earlier inconsiderate act is not done, the later act of taking the tissue away will not occur. The first inconsiderate act affects multiple parties, whereas the second alledged inconsiderate act merely affects the person who started it in the first place. I don't see it as being inconsiderate - more of a way to deal with the first inconsiderate act.
It doesn't really matter, those who wish to continue putting tissue papers can do so, and those who wish to take it away can do so as well. Since those who put tissues think they can enforce such a system of reservation, then others can also be entitled to free tissue paper and free seats.