I went through the shota tag and removed a few posts from it. Noting them down here for posterity and ease of double checking.
post #7710537
post #7709845
post #7706655
post #7706647
post #7681692
post #7660209
post #7652852
post #7585064
post #7585552
post #7584328
post #7584314
post #7541148
post #7523821
post #7348062
There's also some others I didn't think fit in the tag but are more borderline. These still have the tag for now.
post #7721211
post #7705948
post #7672151
post #7567112 and children
post #7564645
post #7550085 and children
post #7456743
I haven't removed any shota-related tags like "onii-shota" or "shotadom" from the posts I removed shota from yet.