Occasionally I think of enhancements for open source software applications I use. Generally I track down wherever it is the project is hosted and log an request. I do not intend to contribute any code, I just want to make a suggestion.
Some projects have guidelines for such requests (not allowing them, allowing them but frowning on "me toos", etc), but others don't. Are there any broadly applicable guidelines or widely referred to articles on how to do this appropriately? (And any notes on making a request from an Ubuntu context?)