talker → stalker

talker n. 谈话者，话多的人
↓
stalker n. 跟踪者
↑
注：因为话多，被盯上了，被跟踪了。
↓
例：Several well-known women have been troubled by stalkers recently. 最近有几位知名的女性遭人跟踪骚扰。（剑桥词典）