Surprisingly, the article was rather neutral, maybe even giving more quotes to those against the idea. From NBC News:

Pinholt, a firearm owner, said she and her co-author, a retired Army Ranger, “are not against guns,” and simply are seeking to reduce suicide risk and boost safety for visitors –- including home-health professionals. Some gun-rights advocates assert, however, the paper’s focus on the elderly is another attempt to try to chip away constitutional freedoms.

“The ‘5 ‘L’s’ suggest that senior citizens must automatically be considered safety risks if they are firearms owners –- a notion we find rather insulting if not preposterous,” said Alan Gottlieb, founder of the Second Amendment Foundation, based in Bellevue, Washington.

“Should we prevent people from serving in public office into their 70s or 80s? Decisions they make could affect millions of citizens,” Gottlieb added. “Simply because someone is older does not mean they should begin to lose their firearms rights … One doesn’t lose his or her civil rights merely because we turn the page of a calendar.”

I couldn’t get the video at the link to play for me.