Hey! I like the idea, it's worth creating a proper tag for though.
As for your problem - it's probably the case more specifically explained in this article: http://www.androidpolice.com/2015/06/16/having-touchscreen-problems-with-your-lg-g4-lg-knows-and-theyre-looking-into-it/
They stated that LG was aware of the problem and was designing a solution. Some people claimed that replacing the launcher might solve the issue.
peaking to us, LG confirmed it is aware of the problem but has not been able to identify the cause or potential solutions. If you're one of the people suffering from this apparent software or hardware defect, sit tight - LG assures us it is actively investigating and we're keeping an open line of communication with their corporate headquarters as this story develops.
After some more investigation I found this: http://www.techtimes.com/articles/62417/20150622/lg-outs-fix-for-lg-g4-touchscreen-issues.htm
It states that LG released a fix, but this fix might not solve all the problems... Try updating our android system.
Last but not least: http://www.androidauthority.com/lg-g4-problems-fixes-621631/ states:
To see whether you are facing any issues with the touchscreen, open the Dialer and enter 277634## or 3845#Model# (where model is the version of the device, e.g. 811, 815, etc.) to enter the Service Menu. Go to Device Test – Service Menu – Manual Test – Touch Draw Test – Manual. Now you can touch, tap, and swipe on the test area and watch for any missed touches, indicated by the lack of a red mark in that area.
If you cannot access the service menu, you can also download an app like Multitouch Test from the Google Play Store, and see if there are any issues with the touchscreen.
As far as the LG Keyboard lag is concerned, LG is rolling out a software update to tackle this problem, and this seems to have alleviated the issue. If you haven’t received this update, you can try a third-party keyboard from the Google Play Store, but some users have reported similar problems with these as well.
Some users have found the issue to reduce or go away completely by using “Force GPU Rendering” in the Developer Options. To unlock these settings, go to Settings – General – About Phone – Software Info and tap on the build number continuously until you see the “You are now a developer” message. Now go to Developer Options in the Settings menu, and activate Force GPU Rendering.
For some users that have used screen protectors, the fix has been as simple as just removing it.
For those users finding whole sections of the screen unresponsive to touch, this is likely a hardware fault, and picking up a replacement may be your only option.
RE: Crowdsource a solution to my Tech Support Issue Steemit, successful response receives reward (Android phone problem)