Can you explain what happened?
I'm not a staff member, but I'd like to help if I can.

I have added more comments about an hour ago, and THEY have been removed.

They were very informative and not the least negative.

This is the second day this has happened.

Please cancel my memebership to this inordinately judgemental and arbitrary website.

And... they just returned.

Wierd

http://www.instructables.com/id/Homemake-Wooden-GoKart-20/

It's quite possible that there was a word you used that set off the website's filter (used to catch words/comments that should not belong on the website). If that happens, the comment may disappear until a staff member can look at the comment to decide if it can be posted or if it should be removed. This happens to all of us from time to time. I can't tell you what "word or words" you used that may have caused the problem, because I don't know all of them, but they exist to ensure that the content on this site remains at a higher quality than what you may find on other websites.

I hope that helps. No one is interested in censoring your feedback or to make you feel unwelcome. As a matter of fact, the people here are all really great once you get to know them. ;-)

Possible reason:

The comments were caught in an automatic filter, and had to be released by a human.

Probable reason:

You have been looking at the same page when logged out. Non-sign-in readers see a slightly out-of-date version of the site to save bandwidth (or something like that), and it can be as much as an hour out of synch with the instantly-updated site seen by members.

Where did you type these comments? Could you provide a link to the page you posted them?