[Digital-Citizen]

If the Input Mono Condensed you're referring to comes from https://djr.com/input/ I recommend reviewing that font's license.

https://djr.com/license/ is a non-free license (the license does not respect your software freedoms to run, copy, share, and modify the software). The license is revocable under unclear and incompletely specified conditions: This license can be terminated at any time for no declared reason "without the obligation of notice or opportunity to cure [a breach of any term of this agreement]". The license tries to place limits that could go beyond what power copyright law grants in Massachusetts, USA (the region the license will be interpreted within). In other words, copyright law in your region may grant you more rights than the state of Massachusetts, USA grants.

[Svenstaro]

So? What's the worst that could happen and how do you even imagine a practical CnD would take place? Somebody spots you using the font at a convention and decides to change the license then and there?

It's not like you can't easily change your font if you're ever required to.