The real reason not to do this is that it makes you look like a scumbag. It's not in your interest to make that association in your customer's minds. For instance, I run a small datacenter on the east coast. We had no downtime due to Sandy, but the level of MSP/CoLo/Managed hosting company cold calls I got in the two weeks after trying to use their uptime during the storm as a sales pitch was unbelievable. every single one of them went in my "scumbucket vendor" file.