I had the bug with Lily in New Vegas where she'd repeat her stealth line every 10-15 seconds. I ended the mission wanting to kill her. I think I cheerfully handed her over for medical experiments after.
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Then be quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Shut up!"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Oh, don't you worry about me dearie, your grandma knows how to stay quiet"
"Shut...shut the fuck up!!!!"