When is it too wet to cut the lawn?

When it rains like it has this past week, it is just too wet to attempt to cut the yard. Most, if not all the mowers are just too heavy to put on the lawn. If you can not walk across the yard without sinking or if it is just like walking on a sponge, then it is simply too wet.  Sometimes I have customers call and want it done.  Do not as it could turn your yard into what looks like an old corn field, leave ruts, and make an all around mess of things. I also have some state they see some companies out cutting.  A lot of times they are cutting commercial lots or in some cases just do not care. We try to avoid this at all cost, but know it will get us behind. There comes a time when you just have to take that chance though.  If you have ever had your lawn messed up then you know exactly what I am talking about.