Adding a settings column to exp_modules

I’ve ran across a couple instances where I just wanted to have one or two settings for a custom module and didn’t know where to save it. Tonight I ran across this post over on the EE StackExchange (http://expressionengine.stackexchange.com/questions/14565/adding-module-configuration-settings-to-config-php) . Is it acceptable to add a column to the modules table to save a few settings for the module? I wasn’t sure if there were any implications especially when it comes to upgrade.