A quick seach on the keyword "thermite" shows otherwise. Who decides what should be considered "dangerous" as much of what is discussed on these forums may be potentially dangerous. By providing intelligent suggestions as to how to deal with handling dangerous substances (such as the filtration of iron-oxide) from a "dangerous" substance (bleach + vinegar) you are making it safer for the person who is attempting to make it. Don't assume that everyone (or even a majority) of the people attempting to make thermite are going to burn a hole through your new escalade. =] Anyhow, don't worry, I'm done.