If you're having a problem and would like to try this ........ go to the Setting page. Click on Comments....scroll down to the Comments Form Message and type in your message. Then set Comments Notifications as "always" and save your alterations. However many comments are made, the number will then appear on your Dashboard .... you click on the number and you will be redirected to the Comments Awaiting Moderation page where you can read the message and select/or not to post.
Also mentioned was setting "Word Verification". I set mine as "No". You do this on the same page - just select either "Yes" or "No" whatever suits you I personally find word verification is not necessary because of how my comment form is set and it does save any frustration to anyone who wants to leave a comment. AND, after all we like to receive comments, BUT NOT FROM SPAMMERS!
Hope you find this info useful.
ps: Thanks PeeJay, you're right and I'm thankful that Blogger does sometimes intervene, BUT NOT ALWAYS because I do sometimes get some weird comments, so I would not like to trust it completely because of the great number of visitors to the Cupboard I seem to be targeted! Not all visitors leave a comment but many do read the comments left by others so I feel I need that extra bit of assurance. But thanks for your input -it may be useful to others.