Blockland is rated M?
What?
"Online interactions NOT rated by the ESRB"
What?
Sounds like a failed source. I thought it was rated T.
EDIT: B&G mod makes sense when you get run over at moderate-high speeds.
Ontopic: It's possible to remove, but it removes most of the emitters. Go to Blockland/base/data/(is it "particle") and look for the cloud image. Delete* it and replace with the common blank.png. If you want ALL blood gone, also do the same with the dot texture.
*Do NOT delete, move to annother location where you will know where it is.