Well, for starters, "God is love" is taken directly from scripture but separated from context. People do this sometimes for a couple of reasons. Sometimes people do it because they either don't related to or don't understand the rest of the scripture that surrounds it, and they are picking and choosing. Sometimes the Holy Spirit actually speaks fragments of scripture to someone's spirit, and it conveys something to that person. Very well. But then it gets repeated so many times that what was originally conveyed is lost and all that's left is a fragment; we need to get back to the context - 1 John 4:7-9. That would be a good study, but we are hear to discuss ambiguous language.....
I agree that when people talk, they need to clarify the meaning of any jargon or ambiguous terms to include people who may not be conversant with those terms in the same way. If we never find ourselves needing to clarify, that means we have not ventured outside our own little bubble of likeminded Christians. How will we ever share the gospel in that way? How will we ever grow from what Christians outside our circle have come to know?