Every technology has both sides of its coin. Internet, god of information, also has its own disadvantages.
Information about a brand, which is not desirable, is also communicated to the customers and hence affects brand image and equity of the brand.
Consider Viagra being sold at a discount or any other premium product sold at a discount via a SPAM mail. It directly contradicts with the positioning aspects of that premium brand that an organisation plans to have. Similarly, it directly affects other branding strategies being planned by the company. Thus, such spam mails could be detrimental to the brand.
But is that always true? One needs to moot on this issue as, though undesirable, such mails help in creating awareness about a newly launched brand of a new brand feature. This can be used as a cost effective method in gaining attention of the customer in a short span of time.
But again, one need to have a fine balance between pros and cons of such a method of information distribution. Innovative methods can be used for information dissipaton down the line whereby there is no effect on any aspect of branding process.