Channels disable without removing

[delds]

using vb 5.1.9

For now I have removed from the menus blogs and cms, may decide to use at a later date.

My question is from the channel list is there a way to make a channel unseen from search engines crawls and basically not existent even with a direct link to it without actually deleting the channel - so it could be brought back later is desired.

Is there a way to decide what content is crawled?

Where can it be selected rather visitor messages is allowed?

Is there a mod to display current search engine crawlers in the what's going on section